Polygon API alternatives
12 other finance APIs compared on authentication, HTTPS, CORS and documented endpoints.
| API | Auth | HTTPS | CORS | Endpoints |
|---|---|---|---|---|
| Polygon | API key | Yes | Unknown | 10 |
| Stripe | API key | Yes | Unknown | 446 |
| SEC EDGAR Data | No auth | Yes | Yes | — |
| Plaid | API key | Yes | Unknown | 198 |
| Fed Treasury | No auth | Yes | Unknown | — |
| Razorpay IFSC | No auth | Yes | Unknown | — |
| Klarna | API key | Yes | Unknown | — |
| Citi | API key | Yes | Unknown | — |
| Zoho Books | OAuth | Yes | Unknown | — |
| FRED | API key | Yes | Yes | — |
| MercadoPago | API key | Yes | Unknown | — |
| Open Banking - Payments initiation service | No auth | Yes | Unknown | 12 |
| GOV.UK Pay API | API key | Yes | Unknown | 10 |
Stripe
FinancePayment processing, subscriptions, and financial management
SEC EDGAR Data
FinanceAPI to access annual reports of public US companies
Plaid
FinanceConnect with user's bank accounts and access transaction data
Fed Treasury
FinanceU.S. Department of the Treasury Data
Razorpay IFSC
FinanceIndian Financial Systems Code (Bank Branch Codes)
Klarna
FinanceKlarna payment and shopping service
Citi
FinanceAll Citigroup account and statement data APIs
Zoho Books
FinanceOnline accounting software, built for your business
FRED
FinanceEconomic data from the Federal Reserve Bank of St. Louis
MercadoPago
FinanceMercado Pago API reference - all the information you need to develop your integrations
Open Banking - Payments initiation service
FinanceOpen Banking - Payments initiation service
GOV.UK Pay API
FinanceGOV.UK Pay API (This version is no longer maintained. See openapi/publicapi_spec.json for latest API specification)